I use a Sheridan Blue Streak rocker safety 20 Cal pump up air rifle , a Benjamin Sheridan Mdl C9 20 Cal with a Williams peep site, and Mdl C9a air rifles made by Crosman. There are scope sites on two of C 9 a pump up air rifles. The 20 Cal rifies are good for shooting cotten tail rabbits out to about 35 Yds with 8 pumps.